A “possible hazardous materials incident” prompted the evacuation of Terminal 4 at London’s Heathrow Airport, one of the world’s busiest air travel hubs. Emergency services responded to reports of a potential hazard, leading to the closure of the check-in area and temporary disruption for passengers. Dozens of flights faced delays, while around 20 individuals reported injuries, though none were life-threatening, according to the Metropolitan Police.
Heathrow Airport officials advised passengers not to travel to Terminal 4, emphasizing that other terminals remained operational. Firefighters and specialist crews assessed the scene, with part of the terminal evacuated as a precaution. National Rail also suspended train services to the affected terminal.
By late Monday evening, Heathrow confirmed Terminal 4 was safe to reopen after emergency responders concluded their investigation. The London Fire Brigade stated they “stood down” their response, and the Metropolitan Police found no trace of “adverse substances.” Despite initial chaos, flights resumed with minimal long-term disruption.
The cause of the incident remains under review, though officials described the event as a “mass hysteria” scenario. Heathrow expressed regret for the inconvenience, reiterating its commitment to passenger safety. Paramedics treated 21 individuals, with one transported to a hospital, though details about the nature of the incident were not disclosed.
Unverified video footage showed passengers waiting outside the terminal, while flight schedules on Heathrow’s website indicated continued operations. Emergency services emphasized that no lasting threats were identified.
